1995547 has 2 divisors, whose sum is σ = 1995548. Its totient is φ = 1995546.

The previous prime is 1995541. The next prime is 1995583. The reversal of 1995547 is 7455991.

It is a weak prime.

It is an emirp because it is prime and its reverse (7455991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1995547 is a prime.

It is not a weakly prime, because it can be changed into another prime (1995541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997773 + 997774.

It is an arithmetic number, because the mean of its divisors is an integer number (997774).

2^1995547 is an apocalyptic number.

1995547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1995547 is an equidigital number, since it uses as much as digits as its factorization.

1995547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 40.

The square root of 1995547 is about 1412.6383118123. The cubic root of 1995547 is about 125.8985283650.

It can be divided in two parts, 19955 and 47, that added together give a palindrome (20002).

The spelling of 1995547 in words is "one million, nine hundred ninety-five thousand, five hundred forty-seven".